Submit button
A submit button is an element in HTML that can be used to submit a <form>. The native submit button elements are:
<button>(its defaulttypeis"submit")<input type="submit"><input type="image">
In addition to submitting a form, a submit button can affect the form's behavior and what data is sent.
Overriding the form's behavior
Submit buttons can override the form's submission behavior through various attributes:
formaction: Override theactionattribute of the form.formenctype: Override theenctypeattribute of the form.formmethod: Override themethodattribute of the form.formnovalidate: Override thenovalidateattribute of the form.formtarget: Override thetargetattribute of the form.
Form data entries
If the submit button is a <button> or <input type="submit"> and has a name attribute, the form data set will include an entry for its name and value.
If the submit button is an <input type="image">, the form data set will include entries for the X and Y coordinates that the user clicked on (e.g. x=100&y=200 or buttonName.x=123&buttonName.y=234).